EP2702367B1 - Compteur de consommation électronique alimenté électriquement par un lecteur - Google Patents

Compteur de consommation électronique alimenté électriquement par un lecteur Download PDF

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Publication number
EP2702367B1
EP2702367B1 EP12724188.3A EP12724188A EP2702367B1 EP 2702367 B1 EP2702367 B1 EP 2702367B1 EP 12724188 A EP12724188 A EP 12724188A EP 2702367 B1 EP2702367 B1 EP 2702367B1
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EP
European Patent Office
Prior art keywords
register
storage capacitor
reading device
controller
meter
Prior art date
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Active
Application number
EP12724188.3A
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German (de)
English (en)
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EP2702367A1 (fr
Inventor
Michael STENSON
James Duncan
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Sensus USA Inc
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Sensus USA Inc
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/065—Indicating or recording devices with transmission devices, e.g. mechanical
    • G01F15/066—Indicating or recording devices with transmission devices, e.g. mechanical involving magnetic transmission devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D4/00—Tariff metering apparatus
    • G01D4/002—Remote reading of utility meters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/061—Indicating or recording devices for remote indication
    • G01F15/063—Indicating or recording devices for remote indication using electrical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/065—Indicating or recording devices with transmission devices, e.g. mechanical
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/068—Indicating or recording devices with electrical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
    • G01F15/075—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means
    • G01F15/0755—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means involving digital counting
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/02—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means
    • G01D5/06—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means acting through a wall or enclosure, e.g. by bellows, by magnetic coupling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/053—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential and axial admission
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/06—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential admission
    • G01F1/075—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential admission with magnetic or electromagnetic coupling to the indicating device
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/30—Smart metering, e.g. specially adapted for remote reading

Definitions

  • the present invention relates generally to metering the flow of commodities, and in particular to a register for a meter that is powered by energy captured from a meter reading device.
  • US5,619,192 describes a register associated with a meter.
  • the claims have been characterised over this document.
  • US4,782,341 discloses a mechanical register which is interrogated by a portable reader.
  • US5,659,300 describes a self-powered water meter comprising a capacitor.
  • US6,181,257 describes a commodity meter having an electronic register and a long-life battery.
  • US2009/135,843 describes a meter with a battery or storage capacitor for use during a mains power outage.
  • Meters are widely used to measure the volumetric flow of commodities-particularly those provided by utilities, such as water, natural gas, and electricity.
  • utilities typically interpose a meter into a conduit (e.g., pipe or wire) supplying a commodity to a residential or commercial end user.
  • the meter includes some transducer operative to sense the volumetric flow of the commodity, and a register operative to maintain metered quantity data, such as a cumulative count of volume units of the commodity that have flowed through the meter. The count is periodically read, and by maintaining a record of at least the most immediate prior reading, interim usage or consumption of the commodity may be ascertained, and used for billing purposes, usage analysis, and the like.
  • the register in many modern commodity usage meters houses electronic circuits that maintain the metered quantity data.
  • the metered quantity data may be read from a register by a reading device applied to each meter, such as via electrical contacts or inductive coupling.
  • a register may include an electrical, optical, or RF interface, connecting it to a communication network (e.g., LAN, WAN, cellular network, or the like), via which the register may be remotely interrogated, or may periodically transmit its identification and metered quantity data.
  • a communication network e.g., LAN, WAN, cellular network, or the like
  • a commodity usage meter is only active when the metered commodity flows-that is, when the commodity (e.g., water) is being consumed by the end user. In many cases, the meter spends the vast majority of its time in an inactive state. During such times, electronic circuits in the register may be placed in an inactive, low-power state, known in the electronic arts as "sleep mode," to conserve power. Even when the meter, and hence electronic circuits in the register, is active, the register's fundamental function of processing a signal from a transducer in the meter, to update and maintain metered quantity data, does not require extensive consumption of power. For example, it may comprise simply detecting pulses from a sensor and incrementing a counter.
  • the greatest power demand of the register may be during a communication session with a reading device - that is, the operation of transmitting the accumulated metered quantity data out of the register. Accordingly, power source that is necessarily available during a metered quantity data communication session would be particularly advantageous.
  • electronic circuits in a register associated with a commodity usage meter capture energy from a meter reading device when the device is coupled to the register (e.g ., either electrically or inductively coupled) for the purpose of reading metered quantity data from the register.
  • Electrical charge obtained from the reading device may be stored in a high-capacity storage capacitor.
  • the capacitor When the capacitor is sufficiently charged, it provides power to at least part of the register circuits, such as a controller, for at least the duration of the communication session with the reading device.
  • the capacitor may additionally supply sufficient power to operate the register until a subsequent reading device coupling.
  • One embodiment relates to a register associated with a meter and operative to record and report flow data for a commodity.
  • the register includes one or more sensors, each operative to intermittently generate a signal related the flow rate of the commodity.
  • the register also includes a controller operative to receive and process the sensor signals to generate data indicative of a metered quantity of the commodity.
  • the controller is further operative to store the metered quantity data, and to output the metered quantity data to a reading device during a communication session according to a predetermined protocol.
  • the register further includes a reading device interface connected in data flow relationship with the controller, and a detector connected to the interface and to the controller. The detector is operative to detect the presence of a reading device.
  • the register additionally includes a capacitor connected to the interface in power flow relationship. The capacitor is operative to store charge provided by the reading device during at least part of the communication session. When the capacitor is sufficiently charged, it is further operative to power at least the controller for at least the duration of the communication session.
  • Another embodiment relates to a method of recording and reporting flow data for a commodity, by a register consisting of electrical circuits, the register being associated with a meter.
  • a signal related the flow rate of the commodity is intermittently received from a sensor proximate the meter.
  • the sensor signal is processed to generate data indicative of a metered quantity of the commodity.
  • the metered quantity data is storing.
  • the presence of a reading device, operative to extract at least the metered quantity data during a communication session according to a predetermined protocol, is detected.
  • Energy is captured from the reading device during the communication session and stored. The captured energy is used to power at least some circuits in the register for at least the duration of the communication session.
  • a representative commodity-metering environment 10 is depicted in Figure 1 .
  • the commodity being metered is water.
  • the metering environment 10 comprises a meter 12, a register 14, and a reading device 16, which is intermittently or periodically coupled to the register 14 for the purpose of extracting metered quantity data.
  • the meter 12 meters the flow of a commodity through it, as indicated by the flow arrows 18.
  • a water meter 12 uses the kinetic energy of the water flow to turn a shaft 22, which in turn rotates a disk 20 on which multiple magnets are located, or which is magnetized to have multiple poles, as indicated.
  • the rotational speed of the disk 20 is directly related to the flow rate of water through the meter 12.
  • the register 14 is associated with the meter 12, and is configured and arranged such that sensors 24a and 24b are proximate the disk 20. These sensors 24a and 24b are operative to detect and quantify rotation of the disk 20 by detecting changes in polarity of magnetic flux from the disk 20 poles. Outputs from these sensors 24a and 24b are detected, amplified, and otherwise processed by a sensor circuit 25, which in turn transmits one or more sensor signals to a controller 26.
  • the sensors 24a and 24b each comprise a "Wiegand Wire.”
  • the Wiegand Wire named for its inventor and described in U.S. Patent No. 3,820,090 , is a device that generates electrical signals when it is exposed to a magnetic field with changing flux polarity.
  • the Wiegand Wire is also known in the art as a Barkenhausen Effect sensor.
  • a suitable sensor 24a, 24b in one embodiment is the Series 2001 Wiegand Wire Sensor manufactured by HID Corporation of North Haven, Conn. This sensor 24a, 24b is capable of detecting rotations from 0 Hz to 50 Hz of a two-pole magnet disk 20.
  • a Wiegand Wire sensor 24a, 24b itself does not require a power source. As the disk 20 rotates, the movement of the magnets induces alternating fields of magnetic flux within the Wiegand Wire sensors 24a, 24b, which are located in close proximity to the disk 20.
  • the rate and direction of fluid flow through the meter 12 may be determined by analyzing the number, rate, and relative timing of pulses generated by the sensors 24a, 24b. This may be accomplished directly by the controller 26, or alternatively may be processed by the sensor circuit 25. In either case, in one embodiment, the sensor inputs generate interrupts to the controller 26.
  • the controller 26 to continue processing inputs from the sensors 24a, 24b (that is, continue to accumulate quantities metered by the meter 20), when the controller 26 is performing other tasks, such as system overhead or transmitting metered quantity data to a reading device 16, as described further herein.
  • the unit volume of fluid flow per sensor pulse depends on the size of the meter 12 body, and thus the sensor pulses are easily calibrated to volumetric quantities.
  • the meter 12 measures other commodities, such as gas or electricity
  • operation of the sensors 24a, 24b will differ.
  • Those of skill in the art are able to apply the energy-capture and power-saving advantages of the present invention to a broad array of metering applications, given the teachings herein.
  • the controller 26 is preferably a low-power microprocessor, but in general may comprise a custom state machine implemented in discrete hardware, programmable logic, or an ASIC; programmable logic together with appropriate firmware; a stored-program microprocessor together with appropriate software; or any combination thereof.
  • a suitable processor is the MSP430F413 Microcontroller manufactured by Texas Instruments of Dallas, TX, or the PIC16F1937 Microcontroller manufactured by MicroChip Technology, Inc. of Chandler, AZ.
  • the controller receives signals from the sensors 24a, 24b, and further processes the signals to generate data representing the metered quantity of a commodity.
  • the controller includes memory 28 operative to store at least the metered quantity data.
  • the memory may comprise, e.g., one or more hardware registers, such as a counter, and/or random access memory such as SRAM, DRAM, Flash, or the like.
  • the controller 26 additionally includes an analog-to-digital-converter (ADC) 30, to monitor storage capacitor 40 voltage levels, as described further herein.
  • ADC analog-to-digital-converter
  • the register 14 includes a reading device interface 32.
  • a reading device 16 when present, couples to the register 14 through the interface 32.
  • the reading device 16 electrically coupled to the register 14, via electrical contacts in the interface 32.
  • the reading device 16 inductively couples to a coil 34 in the register 14.
  • the reading device 16 couples to the register 14 in both a power sharing and a data transfer relationship. That is, the register 14 is operative to extract power from the reading device 16 and the reading device 16 is operative to receive metered quantity data from the controller 26, when the reading device 16 is operatively coupled to the register 14. In some embodiments, such a coupling ( i.e. , a meter reading operation) occurs on the order of monthly.
  • a detector circuit 36 interposed between the controller 26 and the reading device interface 32, is operative to detect the coupling of a reading device 16 to the interface 32 (whether a direct or inductive coupling), and to generate an appropriate signal to the controller 26, such as an interrupt. In this manner, the controller 26 may safely enter a "sleep mode" when no fluid is flowing through the meter 12, and hence no metering signals are generated by the sensors 24a, 24b, without "missing" a meter-reading communication session by a reading device 16.
  • the detector circuit 36 may, in some embodiments, also format metered quantity data being read, to conform to a predetermined protocol.
  • a voltage is present (i.e., at a contact of interface 32 or induced across the coil 34) within the register 14.
  • This voltage is regulated by a voltage regulator 38, to not exceed a peak voltage tolerable by a storage capacitor 40.
  • a suitable voltage regulator 38 is the MIC5205 Load Drop-Out (LDO) regulator manufactured by Micrel Inc. of San Jose, CA.
  • the storage capacitor 40 is preferably a high-capacity storage capacitor, such as an electric (or electrochemical) double-layer capacitor (EDLC), also known in the art as a Hybrid Layered Capacitor (HLC), super-capacitor, ultra-capacitor, super-condenser, or the like.
  • High-capacity storage capacitors 40 are characterized by an energy storage density an order of magnitude (or more) greater than a comparably sized conventional electrolytic capacitor. Although high-capacity storage capacitors 40 store less energy per unit weight than many batteries, their ability to store charge for long durations ( e.g ., several months) is similar to many batteries.
  • high-capacity storage capacitors 40 are superior to batteries as rechargeable power sources in several respects, such as: long life with little degradation over many charge cycles; fast charge rates; low internal resistance and hence high efficiency; high output power; and low toxicity of materials.
  • a suitable high-capacity storage capacitor 40 is the HLC-1520A HLC manufactured by Tadiran Batteries, Ltd. of Lake Success, NY.
  • the storage capacitor 40 is charged by a regulated voltage from the voltage regulator 38 when a reading device 16 is initially coupled to the register 14 via the interface 32 (whether electrically or inductively coupled).
  • the storage capacitor 40 charges rapidly, and is able to provide sufficient power to power the controller 26 for at least a communication session with the reading device 16. That is, once the storage capacitor 40 is fully charged, the controller 26 engages in a transfer of the metered quantity data stored in memory 28 to the reading device 16, according to a predetermined protocol (and in some embodiments, with the assistance of the detector circuit 36), while powered by the storage capacitor 40.
  • the storage capacitor 40 holds sufficient charge, for a sufficient duration, to power the controller 26 long after the communication session with the reading device 16 terminates.
  • the controller 26 continues to operate under power supplied by the storage capacitor 40.
  • the controller 26 is preferably a low-power microprocessor that operates at a reduced voltage level relative to that of the storage capacitor 40.
  • a voltage regulator 42 "steps down" voltage from the storage capacitor 40 to the proper voltage required for operation of the low-power controller 26.
  • the storage capacitor 40 is the only source of stored power in the register 14 (aside from the sensors 24a, 24b, which generate power in response to the changing magnetic flux from the rotating disk 20, and which do not, in any event, store power).
  • a battery 50 provides power storage for operating the controller 26 if the storage capacitor 40 discharges too far.
  • a suitable battery is the TL-4902 Lithium-thionyl chloride battery manufactured by Tadiran Batteries, Ltd. of Lake Success, NY. Since Lithium batteries are non-rechargeable, battery 50 is protected from the storage capacitor 40 charging cycle by an isolator such as a diode 52.
  • a suitable diode 52 is the FDLL300 manufactured by Fairchild Semiconductor of San Jose, CA.
  • the storage capacitor 40 still charges a reading device 16 couples to the register 14, and supplies power to the controller 26 for the duration of a communication session (which is generally the highest power demand function of the controller 26).
  • a threshold circuit 44 together with an op amp 46, maintains the controller 26 in "sleep mode" until the storage capacitor 40 has charged sufficiently to power the controller 26 for the communication session.
  • an ADC circuit 30 within, or associated with, the controller 26 allows software executing on the controller 26 to monitor the voltage level of the storage capacitor 40.
  • the threshold circuit 44 and op amp 46 may be omitted.
  • the controller 26 is operative to output the metered quantity data via a display 48, such as an LCD display.
  • the display 48 is driven whenever the controller 26 is awakened from sleep mode, such as whenever the meter 12 indicates fluid flow or when a reading device 12 is coupled to the register 14.
  • the display 48 is driven only when a reading device 12 is coupled to the register 14, and provides a back-up indication of the metered quantity data against the possibility of a malfunction of the reading device 16.
  • the display may be driven on-demand, such as when a cover of the meter 12 and register 14 assembly is opened, or at other times, as will be readily understood by those of skill in the art.
  • Figure 2 depicts a method 100 of recording and reporting flow data for a commodity, by a register 14 associated with a meter 12.
  • the controller 26, upon power-on will have initialization routines to execute, and may run tests, diagnostics, calibration procedures, and the like, on the register 14, as known in the art.
  • the method 100 of Figure 2 then "begins” when the controller 26, having completed all such "housekeeping” tasks, enters a low power "sleep mode" (block 110).
  • the sensors 24a, 24b As the commodity to be metered flows through the meter 12, the sensors 24a, 24b generate and transmit signals to the controller 26 (block 112), which awakens the controller 26 from sleep mode. The controller 26 then processes the sensor signals to generate data indicative of a metered quantity of the commodity (block 114).
  • the metered quantity data may, in one embodiment, comprise simply a counter that is incremented on receipt of each "forward" pulse from the sensors 24a, 24b.
  • the controller 26 stores the metered quantity data (block 116), which may comprise writing a calculated value to memory 28. Alternatively, the data storage (block 116) may merge with the metered quantity data generation (block 114) by simply incrementing a counter used as the storage memory 28. If no more sensor signals are pending (block 112), that is, if no more metered commodity is flowing, the controller returns to sleep mode (block 110).
  • the detector circuit 32 When a reading device 16 is coupled to the register 14 via the interface 32, the detector circuit 32 will generate an indication of such to the controller 26 (such as an interrupt), awakening it from sleep mode (block 118).
  • the controller 26 starts a communication timer (block 120) (which may, for example, be internal to the controller 26).
  • the communication timer preferably triggers an output, or interrupt, at a time prior to the expiration of the protocol maximum coupling duration that is sufficient to complete a communication session.
  • the storage capacitor 40 begins charging via the voltage regulator 38, thus capturing and storing energy from the reading device 16 (block 122).
  • the voltage from the reading device 16 is present either at a contact on the interface 32 or via inductive coupling to a coil 34.
  • the controller 26 powered by partially discharging the storage capacitor 40 (block 126), engages in a communication session and transmits at least the metered quantity data to the reading device 16 (block 128).
  • the controller 26 may additionally transmit other data, such as a unique device ID or a code representing the type or size of the meter 12.
  • the reading device 16 is removed, and (if no fluid is flowing through the meter 12), the controller returns to sleep mode (block 110).
  • control flow in Figure 2 is depicted as branching at discrete decision blocks 112, 118, 124, those of skill in the art will recognize that the method 100 may be implemented as interrupt-driven, and that interrupts may be serviced according to predetermined priorities. Accordingly, for example, sensor signals received during a meter reading operation (e.g ., blocks 120-128) may be serviced ( e.g ., according to blocks 114, 116), and the meter reading operation continued, although such control flow is not explicitly depicted in Figure 2 .
  • Figure 3 depicts a timing diagram showing the storage capacitor 40 charge cycle during coupling by a reading device 16.
  • the storage capacitor 40 is discharging, as it powers the controller 26, such as during metered quantity data logging operations (note the discharge curve is not to scale; in practice, it would have a much shallower slope).
  • a reading device 16 couples to the register 14 (either eclectically or inductively).
  • the voltage derived from the reading device 16 (directly from an interface 32 contact or from the coil 34) is regulated to the peak capacitor voltage, e.g ., 3.9V as depicted in Fig. 3 , by the voltage regulator 38.
  • the storage capacitor 40 begins charging, as indicated between time points A and B.
  • the storage capacitor 40 voltage exceeds a threshold voltage, which may for example be monitored by the threshold circuit 44 and op amp 46.
  • the controller 26 engages in a communication session with the reading device 16, transferring at least metered quantity data to the reading device 16.
  • the storage capacitor 40 supplies power to the controller 26, which may operate at a lower voltage, such as 2.5V, achieved by the voltage regulator 42.
  • time point B may be reached by expiration of a communication timer (not shown), started at time point A.
  • Fig. 3 indicates, the storage capacitor 40 continues to charge, extracting and storing energy from the reading device 16 for as long as it is coupled to the register 14, or until the storage capacitor 40 is fully charged.
  • the controller 26 has transferred all desired data to the reading device 16, and the communication session ends.
  • the reading device 16 decouples from the register 14, and the storage capacitor 40 begins discharging, as it powers the controller 16, e.g ., performing additional metered quantity data logging.
  • the storage capacitor 40 discharge curve is exaggerated in Fig. 3 .
  • FIG. 3 depicts the battery 50 voltage, e.g ., 3.6V.
  • the battery 50 is not necessary, as the storage capacitor 40 contains sufficient charge to power the controller 26 through many metered quantity data logging instances, until the next reading of metered quantity data by a reading device 16 (and hence recharging of the storage capacitor 40).
  • the battery 50 since the diode 52 isolates the battery 50 from the storage capacitor 40 charging circuit, the battery 50 would only itself begin to discharge if the storage capacitor 40 voltage were to drop below the battery 50 voltage ( e.g ., 3.6V).
  • powering the controller 26 with the storage capacitor 40 prolongs battery 50 life, greatly reducing the necessity and expense of regularly replacing batteries 50 in field-deployed commodity metering systems 10.
  • the present invention provides a means for continuous powering of the register 14 of a commodity metering system 10, between "meter reading” events.
  • the register 14 is free from any requirement of an external energy source. This may dramatically reduce installation and operation costs, as well as eliminate costly battery 50 inspection and replacement operations.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measuring Volume Flow (AREA)

Claims (12)

  1. Registre (14) associé à un appareil de mesure (12) et fonctionnel pour enregistrer et rapporter des données de débit pour un produit de consommation, comprenant :
    une interface de dispositif de lecture (32) configurée pour se coupler fonctionnellement à un dispositif de lecture (16) qui établit de façon intermittente une session de communication avec le registre (14) pour lire des données de quantité mesurée à partir du registre (14) ;
    un ou plusieurs capteurs (24a, 24b) fonctionnels pour générer des signaux de capteur dynamiquement, en réponse au débit du produit de consommation à travers l'appareil de mesure (12) ;
    une unité de commande (26) fonctionnelle pour générer et stocker les données de quantité mesurée, en fonction de la réception et du traitement des signaux de capteur lorsqu'ils apparaissent, et en outre fonctionnelle pour produire en sortie les données de quantité mesurée par l'intermédiaire de l'interface de dispositif de lecture (32), durant chaque session de communication selon un protocole prédéterminé ; et
    caractérisé en ce que le registre (14) comprend en outre :
    un condensateur de stockage (40) couplé à l'interface de dispositif de lecture (32) et fonctionnel pour alimenter l'unité de commande (26) à partir de charge stockée durant chaque session de communication et durant les intervalles entre les sessions de communication, en fonction de la charge à partir d'une tension fournie par le dispositif de lecture (16) durant chaque session de communication.
  2. Registre selon la revendication 1, comprenant en outre un circuit de rétroaction fonctionnel pour surveiller la charge du condensateur de stockage (40), et en outre fonctionnel pour empêcher l'unité de commande (26) d'entreprendre un transfert de données avec le dispositif de lecture (16) durant une session de communication jusqu'à ce que le condensateur de stockage (40) atteigne une charge prédéterminée.
  3. Registre selon la revendication 1, dans lequel, lorsque le condensateur de stockage (40) contient des charges stockées, une tension de condensateur est présente sur une borne positive du condensateur de stockage (40), et dans lequel la borne positive du condensateur de stockage (40) est connectée à une borne de batterie positive par l'intermédiaire d'une diode d'isolation (52), pour que le condensateur de stockage (40) alimente l'unité de commande (26), lorsque la tension de condensateur est suffisamment élevée pour polariser à l'inverse la diode d'isolation (52), et est alimentée à partir d'une batterie (50) couplée à la borne de batterie positive, lorsque la tension de condensateur diminue et arrive à un niveau auquel la diode d'isolation (52) est polarisée en sens direct.
  4. Registre selon la revendication 1, comprenant en outre un premier régulateur de tension (38) interposé entre l'interface de dispositif de lecture (32) et le condensateur de stockage (40), et fonctionnel pour fournir au condensateur de stockage (40) une tension de charge qui est dérivée de la tension fournie par le dispositif de lecture (16) et qui est inférieure à une tension de crête produite en sortie par le dispositif de lecture (16).
  5. Registre selon la revendication 4, comprenant en outre un second régulateur de tension (42) interposé entre une borne positive du condensateur de stockage (40) et une entrée d'énergie électrique de l'unité de commande (26), et fonctionnel pour réguler la tension de condensateur jusqu'à une tension d'alimentation plus basse à l'unité de commande (26).
  6. Registre selon la revendication 5, comprenant en outre une batterie (50) dont la borne positive est couplée à la borne positive du condensateur de stockage (40) par l'intermédiaire d'une diode d'isolation (52) qui isole la batterie (50) de la tension de charge appliquée sur le condensateur de stockage (40) par le premier régulateur de tension (38), pour que l'unité de commande (26) soit alimentée à partir du condensateur de stockage (40) ou de la batterie (50), en fonction du niveau de la charge stockée dans le condensateur de stockage (40).
  7. Registre selon la revendication 1, dans lequel l'interface de dispositif de lecture (32) comprend des contacts électriques.
  8. Registre selon la revendication 1, dans lequel l'interface de dispositif de lecture (32) comprend une bobine (34) couplée par induction au dispositif de lecture (16).
  9. Registre selon la revendication 1, dans lequel le condensateur de stockage (40) comprend un condensateur multicouche hybride (HLC) ou un condensateur à double couche électrique (EDLC).
  10. Registre selon la revendication 1, dans lequel le condensateur de stockage (40) est dimensionné pour fournir suffisamment d'énergie électrique pour faire fonctionner au moins l'unité de commande (26) du registre (14) durant un intervalle de lecture d'appareil de mesure implicite jusqu'à une session de communication suivante.
  11. Registre selon la revendication 10, dans lequel le condensateur de stockage (40) présente une capacité de stockage correspondant à un intervalle de lecture d'appareil de mesure implicite d'au moins un mois.
  12. Registre selon la revendication 1, dans lequel chacun du ou des capteurs (24a, 24b) est fonctionnel pour détecter des changements de champs magnétique dans l'appareil de mesure (12), et dans lequel le capteur (24a, 24b) comprend un fil de Wiegand ou un capteur à effet Hall.
EP12724188.3A 2011-04-26 2012-04-23 Compteur de consommation électronique alimenté électriquement par un lecteur Active EP2702367B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/094,474 US9151654B2 (en) 2011-04-26 2011-04-26 Method and apparatus for capturing energy from a meter reading device
PCT/US2012/034671 WO2012148851A1 (fr) 2011-04-26 2012-04-23 Procédé et appareil pour fournir de l'électricité à un compteur à l'aide d'un dispositif de lecture

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EP2702367A1 EP2702367A1 (fr) 2014-03-05
EP2702367B1 true EP2702367B1 (fr) 2017-08-09

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US (1) US9151654B2 (fr)
EP (1) EP2702367B1 (fr)
BR (1) BR112013027651B1 (fr)
CA (1) CA2834346C (fr)
CL (1) CL2013003122A1 (fr)
ES (1) ES2644532T3 (fr)
MX (1) MX2013012480A (fr)
WO (1) WO2012148851A1 (fr)

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EP3029431A1 (fr) * 2014-12-04 2016-06-08 GWF MessSysteme AG Compteur et procédé de détermination d'index de compteur et procédé de transmission sans fil d'énergie électrique
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CA2834346C (fr) 2018-02-20
MX2013012480A (es) 2014-01-31
US20120274478A1 (en) 2012-11-01
CL2013003122A1 (es) 2014-06-27
BR112013027651A2 (pt) 2017-02-14
ES2644532T3 (es) 2017-11-29
BR112013027651B1 (pt) 2020-10-27
CA2834346A1 (fr) 2012-11-01
EP2702367A1 (fr) 2014-03-05
WO2012148851A1 (fr) 2012-11-01
US9151654B2 (en) 2015-10-06

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